There are old URL reversals on 'wiki' causing errors.
NoReverseMatch: Reverse for 'wiki' with arguments '()' and keyword arguments '{u'path': u'using-ka-lite/deployment/raspberry-pi-deployment'}' not found.
This was a problem on the Central Server, old installations may have had a reference to "content/users" which caused the issue. This is now being removed.
Summary
There are old URL reversals on 'wiki' causing errors.